| EARTHKAM | Earth Knowledge Acquired By Middle-schoolers | - | Scuba Diving |
| ECMWF | European Centre For Medium-range Weather Forecasts | - | Scuba Diving |
| EDC | EROS Data Center | - | Scuba Diving |
| EM | ElectroMagnetic | - | Scuba Diving |
| ENSO | El Ni?o/Southern Oscillation | - | Scuba Diving |
| EOS | Earth Observing System | - | Scuba Diving |
| EOSDIS | Earth Observing System Data And Information System | - | Scuba Diving |
| EPA | Environmental Protection Agency (U.S.) | - | Scuba Diving |
| EPS | European Polar Satellite | - | Scuba Diving |
| ER-2 | Earth Resources (plane) | - | Scuba Diving |
| ERBE | Earth Radiation Budget Experiment | - | Scuba Diving |
| ERBS | Earth Radiation Budget Satellite | - | Scuba Diving |
| EROS | Earth Resources Observing System | - | Scuba Diving |
| ERS | ESA Remote Sensing Satellite | - | Scuba Diving |
| ERSC | Environmental Remote Sensing Center (IES) | - | Scuba Diving |
| ESE | Earth Science Enterprise (NASA) | - | Scuba Diving |
| ESMR | Electrically Scanning Microwave Radiometer | - | Scuba Diving |
| ESOC | European Satellite Operations Center | - | Scuba Diving |
| ESSA | Environmental Science Services Administration (preceded NOAA) | - | Scuba Diving |
| ESSP | Earth System Science Pathfinder Mission (ESSP) | - | Scuba Diving |
| EUMETSAT | EUropean Organization For The Exploitation Of METeorological SATellites | - | Scuba Diving |
